The fish wheel scoops up fish (mainly salmon here) and dumps them into the live well where they stay alive until the fisherman comes to get them.
Bob (our host) holding a Copper River Red Salmon
Fresh red (sockeye) salmon for dinner
a model of a much larger fish wheel at Wrangell - St. Elias National Park
We visited a fish hatchery in Valdez. Very interesting.
Thousands of salmon returning to lay their eggs
The salmon are channeled into the hatchery, where the eggs are harvested. The fish (who would die after spawning anyway) are then used for food products.